Most wont remap as it will invalidate youre warranty and even with bluefins that you can revert back to normal ford can put it on the machine and see whats been done and if the maps been altered and to what and will refuse to touch the car what dtc codes do you have

they wont do it because ford will not honour the warranty leaving it in the remap companies hands and they dont want that since any damage to the engine ford will argue was caused by the remap thats not a fault code

I can confirm you cannot alter the maps on the focus without it being detected by a ford dealer once plugged in the ecu will provide a memory of sorts showing everything including any alterations from the factory settings.
Most tuning boxes simply trick the car into thinking its cold when its not adding more fuel since every car is different and is made with varying engine tolerances theres no such thing as a universal box as for the dtc i cant find it anywhere all chassis dtcs dont go past 2000 likely fords done this so you need to take it to them since its under warranty it wont bevan issue

The lenses have loads of little cracks all over them, I went into Evan Halshaw Ford and they replaced the units but not like for like (I has the led ones and they replaced with non-led)
I complained so they put my cracked ones back on and said they can't give me replacements they also said I caused the cracks because I changed a reverse bulb.
So I still have the cracked ones on and I don't know what I can do about it

Agree if you arent bothered about invalidating youre warranty go with a reputable company also try pumaspeed they do ford mods that ford approve mainly fiesta but a lot of the engines in the fiesta and focus are the same and it wont void any warranty